Suppose a miracle car has a 100 efficient engine and burns fuel ...

[tfester]

Suppose a miracle car has a 100 efficient engine and burns fuel having an energy content of 40 MJ/L. If all resistant forces on this car traveling at highway speeds is 1000 N, what is the overall limit in distance per liter driven on the highway?
 
  A) 30 km
  B) 40 km
  C) 50 km
  D) more than 50 km
  E) not enough information

Question 2

An elevator suspended by a vertical cable is moving downward but slowing down. The force that the cable exerts on the elevator must be
 
  A) greater than the force that Earth exerts on the elevator.
   B) less than the force that Earth exerts on the elevator.
   C) equal to the force that Earth exerts on the elevator.

[orangecrush]

Answer to Question 1

Great help.

Answer to Question 2

A

[tfester]

Both answers were spot on, thank you once again

[orangecrush]

Great! Please up vote